Murray sets record straight on his Aus Open game plan

US OPEN champion Andy Murray has only been on court for seven hours in four matches at Melbourne Park but the Scot says you cannot read too much into the manner of his victories as he heads to a quarter-final showdown with unseeded Frenchman Jeremy Chardy today.

Murray's latest straight-sets success came against another Frenchman in Gilles Simon on Monday 6-3 6-1 6-3.

Simon had little to give following his marathon five-setter against Gael Monfils two days before and the Brit coasted through.

But just because he has had an easy ride so far, does not mean much looking forward, said Murray, who could play Roger Federer if both win their last-eight match-ups.

"Some slams I've started off really, really well and some I had some tough patches in," he said.

"At Wimbledon last year there was one set maybe, against (Ivo) Karlovic, or an hour and a half period where it was tight. The (Marcos) Baghdatis match was fairly tough as well.

"Sometimes at the Australian Open I've started really well and got through to the second week without dropping a set," he said.

"It doesn't really matter. Roger hasn't lost a set either yet and I'm sure will be happy with where he's at, so you just have to wait and see whether you're up to it when the time comes. But I hope I'll be ready."

Federer won through to a quarter-final clash with Jo-Wilfried Tsonga, the man who beat him at Wimbledon at the same stage two years ago, with a comfortable 6-4 7-6 6-2 win over Canadian Milos Raonic.

Chardy followed up his victory over Juan Martin del Potro by knocking out Italy's Andreas Seppi.

The world No 36, who will be playing in his first Grand Slam quarter-final, has lost four of his five matches against Murray, although he won their most recent meeting in Cincinnati last summer.

Murray did not read too much into that result either and said he was confident ahead of today's encounter.

"I normally play quite well against him," Murray said.

"But he's playing good tennis. He's had some big wins this week. He serves well.

"He's very aggressive off his forehand. His backhand is his weaker side, for sure. He hits a lot of slice, doesn't come over it too much. He likes to come forward.

"He can be erratic, but when his game is on, like it's been the last few rounds, he's a very tough player to play because he doesn't give you too much rhythm.